Figure 2. arrow pointing to normal pituitary gland size.
Alpha subunit of pituitary gland which is used as a tumor marker for anterior pituitary gland tumors was also ordered, it was found to be 0.2 ng/ml (normal < 1.8 ng/ml).
Then genetic test was ordered to establish a diagnosis of TSH resistance which confirmed TSH resistance through THRB gene. see figure 3.